Mine is perfect and better than everyone else's! Kidding... seriously though this curve keeps it quiet at low stress levels and cool at high stress levels. Never goes above 70C, and these coolers aren't great.

I decided to leave the fans at automatic, rarely seen my fans pass 38% and my 6970 at 900/1375 rarely goes above 58 Celsius... so I guess I have no need for a fan curve all said and done... lol

I replaced the thermal paste and screwed in the screws very tight on the GPU chip as well... so I imagine that is helping some, I feel a lot of GPU companies don't screw the 4 screws tight enough for pressure on the GPU from heatsink. You have to be careful, but still, mine is doing great.

I decided to leave the fans at automatic, rarely seen my fans pass 38% and my 6970 at 900/1375 rarely goes above 58 Celsius... so I guess I have no need for a fan curve all said and done... lol

I replaced the thermal paste and screwed in the screws very tight on the GPU chip as well... so I imagine that is helping some, I feel a lot of GPU companies don't screw the 4 screws tight enough for pressure on the GPU from heatsink. You have to be careful, but still, mine is doing great.

Honestly fan curves are individual dependent meaning whatever makes you comfortable with sound and temps. You can check out some that have been posted here but in the end you will probably adjust it to your likings.

My logic is letting the temp of the card get ahead of the abilty to cool it.
Once the temp gets that high, That late, Might not be able to get it to cool down.
Although all depends on the air cooling of the card.
Ref card or Non Ref multi fans would also make a difference.